Weired oil light flashing and beeping problems

OK i have a 04 neon se and every once in a while the oil light comes on and wont stop beeping and flashing when i come to a stop and once i get moving it shuts off. And yes it has the right amount of oil in it. Sounds like a oil preassure sending unit to me. If anybody could confirm or verify that for me and tell me where it is located and how difficult it will be to change that would be great. Thanks